The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0e114bd492826a638c43acd6d9e4c3d050d0671e

commit 0e114bd492826a638c43acd6d9e4c3d050d0671e
Author: lanwei <lanwei@chromium.org>
Date: Wed Jun 27 17:42:29 2018

Support multiple touch pointers

There was an issue when we handled multiple touch pointer actions.
SyntheticPointerAction should handle different actions from multiple
touch pointers.

Bug:  856638 
Change-Id: I771181bcfe452631074c95874fd5c1a7807d3e74
Reviewed-on: https://chromium-review.googlesource.com/1113898
Commit-Queue: Lan Wei <lanwei@chromium.org>
Reviewed-by: Ella Ge <eirage@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570829}
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/content/browser/renderer_host/input/synthetic_gesture_controller_unittest.cc
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/content/browser/renderer_host/input/synthetic_pointer_action.cc
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/content/browser/renderer_host/input/synthetic_pointer_action_unittest.cc
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/content/browser/renderer_host/ui_events_helper.cc
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/content/common/input/synthetic_web_input_event_builders.cc
[modify] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/third_party/WebKit/LayoutTests/TestExpectations
[add] https://crrev.com/0e114bd492826a638c43acd6d9e4c3d050d0671e/third_party/WebKit/LayoutTests/fast/events/pointerevents/multi-touch-events.html

The NextAction date has arrived: 2018-07-06